Submission #1948613

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define REP(i,n) for(int i=0,_n=(int)(n);i<_n;++i)
#define ALL(v) (v).begin(),(v).end()
#define CLR(t,v) memset(t,(v),sizeof(t))
template<class T1,class T2>ostream& operator<<(ostream& os,const pair<T1,T2>&a){return os<<"("<<a.first<<","<<a.second<< ")";}
template<class T>void pv(T a,T b){for(T i=a;i!=b;++i)cout<<(*i)<<" ";cout<<endl;}
template<class T>void chmin(T&a,const T&b){if(a>b)a=b;}
template<class T>void chmax(T&a,const T&b){if(a<b)a=b;}


int nextInt() { int x; scanf("%d", &x); return x;}

int main2() {
  int N = nextInt();
  int H = nextInt();
  vector<int> bs;
  int max_a = 0;
  REP(i, N) {
    int a = nextInt();
    int b = nextInt();
    bs.push_back(b);
    max_a = max(max_a, a);
  }
  sort(ALL(bs));
  reverse(ALL(bs));
  int p = 0;
  int ans = 0;
  while (H > 0) {
    if (p < N && bs[p] > max_a) {
      H -= bs[p++];
      ans++;
    } else {
      ans += (H + max_a - 1) / max_a;
      H = 0;
    }
  }
  cout << ans << endl;
  return 0;
}

int main() {
  for (;!cin.eof();cin>>ws)
    main2();
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int nextInt()’:
./Main.cpp:14:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 int nextInt() { int x; scanf("%d", &x); return x;}
                                       ^

Judge Result